/**
 * ***************************************************************************** Copyright (c) 2013,
 * 2014 IBM Corporation and others. All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0 which accompanies this
 * distribution, and is available at http://www.eclipse.org/legal/epl-v10.html
 *
 * <p>Contributors: IBM Corporation - initial API and implementation
 * *****************************************************************************
 */
package org.eclipse.che.plugin.java.server.jdt.quickfix;

import java.util.Hashtable;
import java.util.List;
import org.eclipse.che.plugin.java.server.jdt.testplugin.Java18ProjectTestSetup;
import org.eclipse.che.plugin.java.server.jdt.testplugin.JavaProjectHelper;
import org.eclipse.che.plugin.java.server.jdt.testplugin.TestOptions;
import org.eclipse.jdt.core.ICompilationUnit;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.IPackageFragment;
import org.eclipse.jdt.core.IPackageFragmentRoot;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jdt.core.formatter.DefaultCodeFormatterConstants;
import org.eclipse.jdt.internal.corext.codemanipulation.StubUtility;
import org.eclipse.jdt.internal.corext.fix.FixMessages;
import org.eclipse.jdt.internal.corext.template.java.CodeTemplateContextType;
import org.eclipse.jdt.internal.ui.JavaPlugin;
import org.eclipse.jdt.internal.ui.text.correction.AssistContext;
import org.eclipse.jdt.internal.ui.text.correction.CorrectionMessages;
import org.eclipse.jdt.ui.PreferenceConstants;
import org.eclipse.jface.preference.IPreferenceStore;
import org.junit.After;
import org.junit.Before;
import org.junit.Ignore;
import org.junit.Test;

public class AssistQuickFixTest18 extends QuickFixTest {

  private static final Class THIS = AssistQuickFixTest18.class;

  private IJavaProject fJProject1;

  private IPackageFragmentRoot fSourceFolder;

  public AssistQuickFixTest18() {
    super(new Java18ProjectTestSetup());
  }

  //	public static Test suite() {
  //		return setUpTest(new TestSuite(THIS));
  //	}
  //
  //	public static Test setUpTest(Test test) {
  //		return new Java18ProjectTestSetup(test);
  //	}

  @Before
  public void setUp() throws Exception {
    super.setUp();
    Hashtable options = TestOptions.getDefaultOptions();
    options.put(DefaultCodeFormatterConstants.FORMATTER_TAB_CHAR, JavaCore.SPACE);
    options.put(DefaultCodeFormatterConstants.FORMATTER_TAB_SIZE, "4");
    JavaCore.setOptions(options);

    IPreferenceStore store = JavaPlugin.getDefault().getPreferenceStore();
    store.setValue(PreferenceConstants.CODEGEN_ADD_COMMENTS, false);

    StubUtility.setCodeTemplate(
        CodeTemplateContextType.METHODSTUB_ID, "//TODO\n${body_statement}", null);

    fJProject1 = Java18ProjectTestSetup.getProject();
    fSourceFolder = JavaProjectHelper.addSourceContainer(fJProject1, "src");
  }

  @After
  public void tearDown() throws Exception {
    super.tearDown();
    JavaProjectHelper.clear(fJProject1, Java18ProjectTestSetup.getDefaultClasspath());
  }

  @Test
  public void testAssignParamToField1() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("public interface I {\n");
    buf.append("    default void foo(int x) {\n");
    buf.append("        System.out.println(x);\n");
    buf.append("    }\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("I.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("x");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);

    assertNumberOfProposals(proposals, 0);
  }

  @Test
  public void testAssignParamToField2() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("public interface I {\n");
    buf.append("    static void bar(int x) {\n");
    buf.append("        System.out.println(x);\n");
    buf.append("    }\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("I.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("x");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);

    assertNumberOfProposals(proposals, 0);
  }

  @Test
  public void testConvertToLambda1() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("interface I {\n");
    buf.append("    void method();\n");
    buf.append("}\n");
    buf.append("public class E {\n");
    buf.append("    void bar(I i) {\n");
    buf.append("    }\n");
    buf.append("    void foo() {\n");
    buf.append("        bar(new I() {\n");
    buf.append("            public void method() {\n");
    buf.append("                System.out.println();\n");
    buf.append("                System.out.println();\n");
    buf.append("            }\n");
    buf.append("        });\n");
    buf.append("    }\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("I()");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);

    assertNumberOfProposals(proposals, 2);
    assertCorrectLabels(proposals);

    buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("interface I {\n");
    buf.append("    void method();\n");
    buf.append("}\n");
    buf.append("public class E {\n");
    buf.append("    void bar(I i) {\n");
    buf.append("    }\n");
    buf.append("    void foo() {\n");
    buf.append("        bar(() -> {\n");
    buf.append("            System.out.println();\n");
    buf.append("            System.out.println();\n");
    buf.append("        });\n");
    buf.append("    }\n");
    buf.append("}\n");
    String expected1 = buf.toString();

    assertExpectedExistInProposals(proposals, new String[] {expected1});
  }

  @Test
  public void testConvertToLambda2() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("interface I {\n");
    buf.append("    void method(int a, int b);\n");
    buf.append("}\n");
    buf.append("public class E {\n");
    buf.append("    void bar(I i) {\n");
    buf.append("    }\n");
    buf.append("    void foo() {\n");
    buf.append("        bar(new I() {\n");
    buf.append("            public void method(int a, int b) {\n");
    buf.append("                System.out.println(a+b);\n");
    buf.append("                System.out.println(a+b);\n");
    buf.append("            }\n");
    buf.append("        });\n");
    buf.append("    }\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("I()");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);

    assertNumberOfProposals(proposals, 2);
    assertCorrectLabels(proposals);

    buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("interface I {\n");
    buf.append("    void method(int a, int b);\n");
    buf.append("}\n");
    buf.append("public class E {\n");
    buf.append("    void bar(I i) {\n");
    buf.append("    }\n");
    buf.append("    void foo() {\n");
    buf.append("        bar((a, b) -> {\n");
    buf.append("            System.out.println(a+b);\n");
    buf.append("            System.out.println(a+b);\n");
    buf.append("        });\n");
    buf.append("    }\n");
    buf.append("}\n");
    String expected1 = buf.toString();

    assertExpectedExistInProposals(proposals, new String[] {expected1});
  }

  @Test
  public void testConvertToLambda3() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("interface I {\n");
    buf.append("    void method();\n");
    buf.append("    boolean equals(Object obj);\n");
    buf.append("}\n");
    buf.append("public class E {\n");
    buf.append("    void bar(I i) {\n");
    buf.append("    }\n");
    buf.append("    void foo() {\n");
    buf.append("        bar(new I() {\n");
    buf.append("            public void method() {\n");
    buf.append("                System.out.println();\n");
    buf.append("            }\n");
    buf.append("            public boolean equals(Object obj) {\n");
    buf.append("                return false;\n");
    buf.append("            }\n");
    buf.append("        });\n");
    buf.append("    }\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("I()");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);

    assertNumberOfProposals(proposals, 1);
    assertProposalDoesNotExist(
        proposals, FixMessages.LambdaExpressionsFix_convert_to_lambda_expression);
  }

  @Test
  public void testConvertToLambda4() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("interface I {\n");
    buf.append("    void method();\n");
    buf.append("}\n");
    buf.append("public class E {\n");
    buf.append("    void bar(I i) {\n");
    buf.append("    }\n");
    buf.append("    void foo() {\n");
    buf.append("        bar(new I() {\n");
    buf.append("            int count=0;\n");
    buf.append("            public void method() {\n");
    buf.append("                System.out.println();\n");
    buf.append("                count++;\n");
    buf.append("            }\n");
    buf.append("        });\n");
    buf.append("    }\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("I()");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);

    assertNumberOfProposals(proposals, 1);
    assertProposalDoesNotExist(
        proposals, FixMessages.LambdaExpressionsFix_convert_to_lambda_expression);
  }

  @Test
  public void testConvertToLambda5() throws Exception {
    // Quick assist should not be offered in 1.7 mode
    JavaProjectHelper.set17CompilerOptions(fJProject1);
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    try {
      StringBuffer buf = new StringBuffer();
      buf.append("package test1;\n");
      buf.append("interface I {\n");
      buf.append("    void method();\n");
      buf.append("}\n");
      buf.append("public class E {\n");
      buf.append("    void bar(I i) {\n");
      buf.append("    }\n");
      buf.append("    void foo() {\n");
      buf.append("        bar(new I() {\n");
      buf.append("            public void method() {\n");
      buf.append("                System.out.println();\n");
      buf.append("            }\n");
      buf.append("        });\n");
      buf.append("    }\n");
      buf.append("}\n");
      ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null);

      int offset = buf.toString().indexOf("I()");
      AssistContext context = getCorrectionContext(cu, offset, 0);
      assertNoErrors(context);
      List proposals = collectAssists(context, false);

      assertNumberOfProposals(proposals, 1);
      assertProposalDoesNotExist(
          proposals, FixMessages.LambdaExpressionsFix_convert_to_lambda_expression);
    } finally {
      JavaProjectHelper.set18CompilerOptions(fJProject1);
    }
  }

  @Test
  public void testConvertToLambda6() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("interface I {\n");
    buf.append("    boolean equals(Object obj);\n");
    buf.append("}\n");
    buf.append("public class E {\n");
    buf.append("    void bar(I i) {\n");
    buf.append("    }\n");
    buf.append("    void foo() {\n");
    buf.append("        bar(new I() {\n");
    buf.append("            public boolean equals(Object obj) {\n");
    buf.append("                return false;\n");
    buf.append("            }\n");
    buf.append("        });\n");
    buf.append("    }\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("I()");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);

    assertNumberOfProposals(proposals, 1);
    assertProposalDoesNotExist(
        proposals, FixMessages.LambdaExpressionsFix_convert_to_lambda_expression);
  }

  @Test
  public void testConvertToLambda7() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("abstract class C {\n");
    buf.append("    abstract void method();\n");
    buf.append("}\n");
    buf.append("public class E {\n");
    buf.append("    void bar(C c) {\n");
    buf.append("    }\n");
    buf.append("    void foo() {\n");
    buf.append("        bar(new C() {\n");
    buf.append("            public void method() {\n");
    buf.append("                System.out.println();\n");
    buf.append("            }\n");
    buf.append("        });\n");
    buf.append("    }\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("C()");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);

    assertNumberOfProposals(proposals, 1);
    assertProposalDoesNotExist(
        proposals, FixMessages.LambdaExpressionsFix_convert_to_lambda_expression);
  }

  @Test
  public void testConvertToLambda8() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("interface I {\n");
    buf.append("    void method();\n");
    buf.append("}\n");
    buf.append("public class E {\n");
    buf.append("    void bar(I i) {\n");
    buf.append("    }\n");
    buf.append("    void foo() {\n");
    buf.append("        bar(new I() {\n");
    buf.append("            public void method() {\n");
    buf.append("                System.out.println();\n");
    buf.append("            }\n");
    buf.append("        });\n");
    buf.append("    }\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("I()");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);

    assertNumberOfProposals(proposals, 2);
    assertCorrectLabels(proposals);

    buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("interface I {\n");
    buf.append("    void method();\n");
    buf.append("}\n");
    buf.append("public class E {\n");
    buf.append("    void bar(I i) {\n");
    buf.append("    }\n");
    buf.append("    void foo() {\n");
    buf.append("        bar(() -> System.out.println());\n");
    buf.append("    }\n");
    buf.append("}\n");
    String expected1 = buf.toString();

    assertExpectedExistInProposals(proposals, new String[] {expected1});
  }

  @Test
  public void testConvertToLambda9() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("interface I {\n");
    buf.append("    int method();\n");
    buf.append("}\n");
    buf.append("public class E {\n");
    buf.append("    void bar(I i) {\n");
    buf.append("    }\n");
    buf.append("    void foo() {\n");
    buf.append("        bar(new I() {\n");
    buf.append("            public int method() {\n");
    buf.append("                return 1;\n");
    buf.append("            }\n");
    buf.append("        });\n");
    buf.append("    }\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("I()");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);

    assertNumberOfProposals(proposals, 2);
    assertCorrectLabels(proposals);

    buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("interface I {\n");
    buf.append("    int method();\n");
    buf.append("}\n");
    buf.append("public class E {\n");
    buf.append("    void bar(I i) {\n");
    buf.append("    }\n");
    buf.append("    void foo() {\n");
    buf.append("        bar(() -> 1);\n");
    buf.append("    }\n");
    buf.append("}\n");
    String expected1 = buf.toString();

    assertExpectedExistInProposals(proposals, new String[] {expected1});
  }

  @Test
  public void testConvertToLambda10() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("interface I {\n");
    buf.append("    int foo(String s);\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("interface J {\n");
    buf.append("    Integer foo(String s);\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("public class X {\n");
    buf.append("    static void goo(I i) { }\n");
    buf.append("\n");
    buf.append("    static void goo(J j) { }\n");
    buf.append("\n");
    buf.append("    public static void main(String[] args) {\n");
    buf.append("        goo(new I() {\n");
    buf.append("            @Override\n");
    buf.append("            public int foo(String s) {\n");
    buf.append("                return 0;\n");
    buf.append("            }\n");
    buf.append("        });\n");
    buf.append("    }\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("X.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("I()");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);

    assertNumberOfProposals(proposals, 2);
    assertCorrectLabels(proposals);

    buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("interface I {\n");
    buf.append("    int foo(String s);\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("interface J {\n");
    buf.append("    Integer foo(String s);\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("public class X {\n");
    buf.append("    static void goo(I i) { }\n");
    buf.append("\n");
    buf.append("    static void goo(J j) { }\n");
    buf.append("\n");
    buf.append("    public static void main(String[] args) {\n");
    buf.append("        goo((I) s -> 0);\n");
    buf.append("    }\n");
    buf.append("}\n");
    String expected1 = buf.toString();

    assertExpectedExistInProposals(proposals, new String[] {expected1});
  }

  @Test
  public void testConvertToLambda11() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("interface I {\n");
    buf.append("    int foo(String s);\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("interface J {\n");
    buf.append("    Integer foo(String s);\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("public class X extends Y {\n");
    buf.append("    static void goo(I i) { }\n");
    buf.append("    public static void main(String[] args) {\n");
    buf.append("        goo(new I() {\n");
    buf.append("            @Override\n");
    buf.append("            public int foo(String s) {\n");
    buf.append("                return 0;\n");
    buf.append("            }\n");
    buf.append("        });\n");
    buf.append("    }\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("class Y {\n");
    buf.append("    private static void goo(J j) { }    \n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("X.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("I()");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);

    assertNumberOfProposals(proposals, 2);
    assertCorrectLabels(proposals);

    buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("interface I {\n");
    buf.append("    int foo(String s);\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("interface J {\n");
    buf.append("    Integer foo(String s);\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("public class X extends Y {\n");
    buf.append("    static void goo(I i) { }\n");
    buf.append("    public static void main(String[] args) {\n");
    buf.append("        goo(s -> 0);\n");
    buf.append("    }\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("class Y {\n");
    buf.append("    private static void goo(J j) { }    \n");
    buf.append("}\n");
    String expected1 = buf.toString();

    assertExpectedExistInProposals(proposals, new String[] {expected1});
  }

  @Test
  public void testConvertToLambda12() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("interface I {\n");
    buf.append("    int foo(String s);\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("interface J {\n");
    buf.append("    Integer foo(String s);\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("public class X extends Y {\n");
    buf.append("    static void goo(I i) { }\n");
    buf.append("    public static void main(String[] args) {\n");
    buf.append("        goo(new I() {\n");
    buf.append("            @Override\n");
    buf.append("            public int foo(String s) {\n");
    buf.append("                return 0;\n");
    buf.append("            }\n");
    buf.append("        });\n");
    buf.append("    }\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("class Y {\n");
    buf.append("    static void goo(J j) { }    \n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("X.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("I()");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);

    assertNumberOfProposals(proposals, 2);
    assertCorrectLabels(proposals);

    buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("interface I {\n");
    buf.append("    int foo(String s);\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("interface J {\n");
    buf.append("    Integer foo(String s);\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("public class X extends Y {\n");
    buf.append("    static void goo(I i) { }\n");
    buf.append("    public static void main(String[] args) {\n");
    buf.append("        goo((I) s -> 0);\n");
    buf.append("    }\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("class Y {\n");
    buf.append("    static void goo(J j) { }    \n");
    buf.append("}\n");
    String expected1 = buf.toString();

    assertExpectedExistInProposals(proposals, new String[] {expected1});
  }

  @Test
  public void testConvertToLambda13() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("interface J {\n");
    buf.append("    <M> J run(M x);\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("class Test {\n");
    buf.append("    J j = new J() {\n");
    buf.append("        @Override\n");
    buf.append("        public <M> J run(M x) {\n");
    buf.append("            return null;\n");
    buf.append("        }\n");
    buf.append("    };    \n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("Test.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("J()"); // generic lambda not allowed
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);
    assertNumberOfProposals(proposals, 1);
    assertCorrectLabels(proposals);
    assertProposalDoesNotExist(
        proposals, FixMessages.LambdaExpressionsFix_convert_to_lambda_expression);
  }

  @Test
  public void testConvertToLambda14() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("@FunctionalInterface\n");
    buf.append("interface FI {\n");
    buf.append("    int foo(int x, int y, int z);\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("class C {\n");
    buf.append("    int i;\n");
    buf.append("    private void test(int x) {\n");
    buf.append("        int y;\n");
    buf.append("        FI fi = new FI() {\n");
    buf.append("            @Override\n");
    buf.append("            public int foo(int x/*km*/, int i /*inches*/, int y/*yards*/) {\n");
    buf.append("                return x + i + y;\n");
    buf.append("            }\n");
    buf.append("        };\n");
    buf.append("    }\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("C.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("FI()");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);

    assertNumberOfProposals(proposals, 2);
    assertCorrectLabels(proposals);

    buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("@FunctionalInterface\n");
    buf.append("interface FI {\n");
    buf.append("    int foo(int x, int y, int z);\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("class C {\n");
    buf.append("    int i;\n");
    buf.append("    private void test(int x) {\n");
    buf.append("        int y;\n");
    buf.append("        FI fi = (x1/*km*/, i /*inches*/, y1/*yards*/) -> x1 + i + y1;\n");
    buf.append("    }\n");
    buf.append("}\n");
    String expected1 = buf.toString();

    assertExpectedExistInProposals(proposals, new String[] {expected1});
  }

  @Test
  public void testConvertToLambda15() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("@FunctionalInterface\n");
    buf.append("interface FI {\n");
    buf.append("    int foo(int x, int y, int z);\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("class C {\n");
    buf.append("    int i;\n");
    buf.append("    private void test(int x, int y, int z) {\n");
    buf.append("        FI fi = new FI() {\n");
    buf.append("            @Override\n");
    buf.append("            public int foo(int a, int b, int z) {\n");
    buf.append("                int x= 0, y=0; \n");
    buf.append("                return x + y + z;\n");
    buf.append("            }\n");
    buf.append("        };\n");
    buf.append("    }\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("C.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("FI()");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);

    assertNumberOfProposals(proposals, 2);
    assertCorrectLabels(proposals);

    buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("@FunctionalInterface\n");
    buf.append("interface FI {\n");
    buf.append("    int foo(int x, int y, int z);\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("class C {\n");
    buf.append("    int i;\n");
    buf.append("    private void test(int x, int y, int z) {\n");
    buf.append("        FI fi = (a, b, z1) -> {\n");
    buf.append("            int x1= 0, y1=0; \n");
    buf.append("            return x1 + y1 + z1;\n");
    buf.append("        };\n");
    buf.append("    }\n");
    buf.append("}\n");
    String expected1 = buf.toString();

    assertExpectedExistInProposals(proposals, new String[] {expected1});
  }

  @Test
  public void testConvertToLambda16() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("interface FI {\n");
    buf.append("    void foo();\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("class C1 {\n");
    buf.append("    void fun1() {\n");
    buf.append("        int c = 0; // [1]\n");
    buf.append("        FI test = new FI() {\n");
    buf.append("            @Override\n");
    buf.append("            public void foo() {\n");
    buf.append("                for (int c = 0; c < 10;) { /* [2] */ }\n");
    buf.append("                for (int c = 0; c < 20;) { /* [3] */ }\n");
    buf.append("            }\n");
    buf.append("        };\n");
    buf.append("    }\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("C1.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("FI()");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);

    assertNumberOfProposals(proposals, 2);
    assertCorrectLabels(proposals);

    buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("interface FI {\n");
    buf.append("    void foo();\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("class C1 {\n");
    buf.append("    void fun1() {\n");
    buf.append("        int c = 0; // [1]\n");
    buf.append("        FI test = () -> {\n");
    buf.append("            for (int c1 = 0; c1 < 10;) { /* [2] */ }\n");
    buf.append("            for (int c2 = 0; c2 < 20;) { /* [3] */ }\n");
    buf.append("        };\n");
    buf.append("    }\n");
    buf.append("}\n");
    String expected1 = buf.toString();

    assertExpectedExistInProposals(proposals, new String[] {expected1});
  }

  @Test
  public void testConvertToLambda17() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("interface X {\n");
    buf.append("    void foo();\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("public class CX {\n");
    buf.append("    private void fun(int a) {\n");
    buf.append("        X x= new X() {\n");
    buf.append("            @Override\n");
    buf.append("            public void foo() {\n");
    buf.append("                int a; \n");
    buf.append("                int a1;\n");
    buf.append("            }\n");
    buf.append("        };\n");
    buf.append("    }\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("CX.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("X()");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);

    assertNumberOfProposals(proposals, 2);
    assertCorrectLabels(proposals);

    buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("interface X {\n");
    buf.append("    void foo();\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("public class CX {\n");
    buf.append("    private void fun(int a) {\n");
    buf.append("        X x= () -> {\n");
    buf.append("            int a2; \n");
    buf.append("            int a1;\n");
    buf.append("        };\n");
    buf.append("    }\n");
    buf.append("}\n");
    String expected1 = buf.toString();

    assertExpectedExistInProposals(proposals, new String[] {expected1});
  }

  @Test
  public void testConvertToLambda18() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("interface FIOther {\n");
    buf.append("    void run(int x);\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("public class TestOther {\n");
    buf.append("    void init() {\n");
    buf.append("        String x;\n");
    buf.append("        m(x1 -> {\n");
    buf.append("            FIOther fi = new FIOther() {\n");
    buf.append("                @Override\n");
    buf.append("                public void run(int x1) { \n");
    buf.append("                    return;\n");
    buf.append("                }\n");
    buf.append("            };\n");
    buf.append("        });\n");
    buf.append("    }\n");
    buf.append("\n");
    buf.append("    void m(FIOther fi) {\n");
    buf.append("    };\n");
    buf.append("}\n");
    ICompilationUnit cu =
        pack1.createCompilationUnit("TestOther.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("FIOther()");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);

    assertNumberOfProposals(proposals, 2);
    assertCorrectLabels(proposals);

    buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("interface FIOther {\n");
    buf.append("    void run(int x);\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("public class TestOther {\n");
    buf.append("    void init() {\n");
    buf.append("        String x;\n");
    buf.append("        m(x1 -> {\n");
    buf.append("            FIOther fi = x11 -> { \n");
    buf.append("                return;\n");
    buf.append("            };\n");
    buf.append("        });\n");
    buf.append("    }\n");
    buf.append("\n");
    buf.append("    void m(FIOther fi) {\n");
    buf.append("    };\n");
    buf.append("}\n");
    String expected1 = buf.toString();

    assertExpectedExistInProposals(proposals, new String[] {expected1});
  }

  @Test
  public void testConvertToLambdaAmbiguousOverridden() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("import java.util.ArrayList;\n");
    buf.append("import java.util.function.Predicate;\n");
    buf.append("\n");
    buf.append("public class Test {\n");
    buf.append("    void foo(ArrayList<String> list) {\n");
    buf.append("        list.removeIf(new Predicate<String>() {\n");
    buf.append("            @Override\n");
    buf.append("            public boolean test(String t) {\n");
    buf.append("                return t.isEmpty();\n");
    buf.append("            }\n");
    buf.append("        });\n");
    buf.append("    }\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("Test.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("public boolean test(");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);

    assertNumberOfProposals(proposals, 1);
    assertCorrectLabels(proposals);

    buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("import java.util.ArrayList;\n");
    buf.append("\n");
    buf.append("public class Test {\n");
    buf.append("    void foo(ArrayList<String> list) {\n");
    buf.append("        list.removeIf(t -> t.isEmpty());\n");
    buf.append("    }\n");
    buf.append("}\n");
    String expected1 = buf.toString();

    assertExpectedExistInProposals(proposals, new String[] {expected1});
  }

  @Test
  public void testConvertToAnonymousClassCreation1() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("interface I {\n");
    buf.append("    void method();\n");
    buf.append("}\n");
    buf.append("public class E {\n");
    buf.append("    void bar(I i) {\n");
    buf.append("    }\n");
    buf.append("    void foo() {\n");
    buf.append("        bar(() -> {\n");
    buf.append("            System.out.println();\n");
    buf.append("            System.out.println();\n");
    buf.append("        });\n");
    buf.append("    }\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("->");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);

    assertNumberOfProposals(proposals, 4);
    assertCorrectLabels(proposals);

    buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("interface I {\n");
    buf.append("    void method();\n");
    buf.append("}\n");
    buf.append("public class E {\n");
    buf.append("    void bar(I i) {\n");
    buf.append("    }\n");
    buf.append("    void foo() {\n");
    buf.append("        bar(new I() {\n");
    buf.append("            @Override\n");
    buf.append("            public void method() {\n");
    buf.append("                System.out.println();\n");
    buf.append("                System.out.println();\n");
    buf.append("            }\n");
    buf.append("        });\n");
    buf.append("    }\n");
    buf.append("}\n");
    String expected1 = buf.toString();

    assertExpectedExistInProposals(proposals, new String[] {expected1});
  }

  @Test
  public void testConvertToAnonymousClassCreation2() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("interface I {\n");
    buf.append("    void method(int a, int b);\n");
    buf.append("}\n");
    buf.append("public class E {\n");
    buf.append("    void bar(I i) {\n");
    buf.append("    }\n");
    buf.append("    void foo() {\n");
    buf.append("        bar((int a, int b) -> {\n");
    buf.append("            System.out.println(a+b);\n");
    buf.append("            System.out.println(a+b);\n");
    buf.append("        });\n");
    buf.append("    }\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("->");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);

    assertNumberOfProposals(proposals, 3);
    assertCorrectLabels(proposals);

    buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("interface I {\n");
    buf.append("    void method(int a, int b);\n");
    buf.append("}\n");
    buf.append("public class E {\n");
    buf.append("    void bar(I i) {\n");
    buf.append("    }\n");
    buf.append("    void foo() {\n");
    buf.append("        bar(new I() {\n");
    buf.append("            @Override\n");
    buf.append("            public void method(int a, int b) {\n");
    buf.append("                System.out.println(a+b);\n");
    buf.append("                System.out.println(a+b);\n");
    buf.append("            }\n");
    buf.append("        });\n");
    buf.append("    }\n");
    buf.append("}\n");
    String expected1 = buf.toString();

    assertExpectedExistInProposals(proposals, new String[] {expected1});
  }

  @Test
  public void testConvertToAnonymousClassCreation3() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("interface I {\n");
    buf.append("    void method();\n");
    buf.append("}\n");
    buf.append("public class E {\n");
    buf.append("    void bar(I i) {\n");
    buf.append("    }\n");
    buf.append("    void foo() {\n");
    buf.append("        bar(() -> System.out.println());\n");
    buf.append("    }\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("->");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);

    assertNumberOfProposals(proposals, 5);
    assertCorrectLabels(proposals);

    buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("interface I {\n");
    buf.append("    void method();\n");
    buf.append("}\n");
    buf.append("public class E {\n");
    buf.append("    void bar(I i) {\n");
    buf.append("    }\n");
    buf.append("    void foo() {\n");
    buf.append("        bar(new I() {\n");
    buf.append("            @Override\n");
    buf.append("            public void method() {\n");
    buf.append("                System.out.println();\n");
    buf.append("            }\n");
    buf.append("        });\n");
    buf.append("    }\n");
    buf.append("}\n");
    String expected1 = buf.toString();

    assertExpectedExistInProposals(proposals, new String[] {expected1});
  }

  @Test
  public void testConvertToAnonymousClassCreation4() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("interface I {\n");
    buf.append("    int method();\n");
    buf.append("}\n");
    buf.append("public class E {\n");
    buf.append("    void bar(I i) {\n");
    buf.append("    }\n");
    buf.append("    void foo() {\n");
    buf.append("        bar(() -> 1);\n");
    buf.append("    }\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("->");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);

    assertNumberOfProposals(proposals, 5);
    assertCorrectLabels(proposals);

    buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("interface I {\n");
    buf.append("    int method();\n");
    buf.append("}\n");
    buf.append("public class E {\n");
    buf.append("    void bar(I i) {\n");
    buf.append("    }\n");
    buf.append("    void foo() {\n");
    buf.append("        bar(new I() {\n");
    buf.append("            @Override\n");
    buf.append("            public int method() {\n");
    buf.append("                return 1;\n");
    buf.append("            }\n");
    buf.append("        });\n");
    buf.append("    }\n");
    buf.append("}\n");
    String expected1 = buf.toString();

    assertExpectedExistInProposals(proposals, new String[] {expected1});
  }

  @Test
  public void testConvertToAnonymousClassCreation5() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("interface FX {\n");
    buf.append("    default int defaultMethod(String x) {\n");
    buf.append("        return -1;\n");
    buf.append("    }\n");
    buf.append("\n");
    buf.append("    int foo(int x);\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("class TestX {\n");
    buf.append("    FX fxx = x -> {\n");
    buf.append("        return (new FX() {\n");
    buf.append("            @Override\n");
    buf.append("            public int foo(int x) {\n");
    buf.append("                return 0;\n");
    buf.append("            }\n");
    buf.append("        }).defaultMethod(\"a\");\n");
    buf.append("    };\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("TestX.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("->");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);

    assertNumberOfProposals(proposals, 2);
    assertCorrectLabels(proposals);

    buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("interface FX {\n");
    buf.append("    default int defaultMethod(String x) {\n");
    buf.append("        return -1;\n");
    buf.append("    }\n");
    buf.append("\n");
    buf.append("    int foo(int x);\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("class TestX {\n");
    buf.append("    FX fxx = new FX() {\n");
    buf.append("        @Override\n");
    buf.append("        public int foo(int x) {\n");
    buf.append("            return (new FX() {\n");
    buf.append("                @Override\n");
    buf.append("                public int foo(int x) {\n");
    buf.append("                    return 0;\n");
    buf.append("                }\n");
    buf.append("            }).defaultMethod(\"a\");\n");
    buf.append("        }\n");
    buf.append("    };\n");
    buf.append("}\n");
    String expected1 = buf.toString();

    assertExpectedExistInProposals(proposals, new String[] {expected1});
  }

  @Test
  public void testConvertToAnonymousClassCreation6() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("import java.util.function.UnaryOperator;\n");
    buf.append("\n");
    buf.append("public class Snippet {\n");
    buf.append("    UnaryOperator<String> fi3 = x -> {\n");
    buf.append("        return x.toString();\n");
    buf.append("    };\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("Snippet.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("->");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);

    assertNumberOfProposals(proposals, 2);
    assertCorrectLabels(proposals);

    buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("import java.util.function.UnaryOperator;\n");
    buf.append("\n");
    buf.append("public class Snippet {\n");
    buf.append("    UnaryOperator<String> fi3 = new UnaryOperator<String>() {\n");
    buf.append("        @Override\n");
    buf.append("        public String apply(String x) {\n");
    buf.append("            return x.toString();\n");
    buf.append("        }\n");
    buf.append("    };\n");
    buf.append("}\n");
    String expected1 = buf.toString();

    assertExpectedExistInProposals(proposals, new String[] {expected1});
  }

  @Test
  @Ignore
  // Bug 427694: [1.8][compiler] Functional interface not identified correctly
  public void _testConvertToAnonymousClassCreation7() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("interface I { Object m(Class c); }\n");
    buf.append("interface J<S> { S m(Class<?> c); }\n");
    buf.append("interface K<T> { T m(Class<?> c); }\n");
    buf.append("interface Functional<S,T> extends I, J<S>, K<T> {}\n");
    buf.append("\n");
    buf.append("class C {\n");
    buf.append("    Functional<?, ?> fun= (c) -> { return null;};\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("C.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("->");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);

    assertNumberOfProposals(proposals, 2);
    assertCorrectLabels(proposals);

    buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("interface I { Object m(Class c); }\n");
    buf.append("interface J<S> { S m(Class<?> c); }\n");
    buf.append("interface K<T> { T m(Class<?> c); }\n");
    buf.append("interface Functional<S,T> extends I, J<S>, K<T> {}\n");
    buf.append("\n");
    buf.append("class C {\n");
    buf.append("    Functional<?, ?> fun= new Functional<Object, Object>() {\n");
    buf.append("        @Override\n");
    buf.append("        public Object m(Class c) {\n");
    buf.append("            return null;\n");
    buf.append("        }\n");
    buf.append("    };\n");
    buf.append("}\n");
    String expected1 = buf.toString();

    assertExpectedExistInProposals(proposals, new String[] {expected1});
  }

  @Test
  public void testConvertToAnonymousClassCreationWithParameterName() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("import java.util.function.IntFunction;\n");
    buf.append("public class E {\n");
    buf.append("    IntFunction<String> toString= (int i) -> Integer.toString(i);\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("->");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);

    assertNumberOfProposals(proposals, 2);
    assertCorrectLabels(proposals);

    buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("import java.util.function.IntFunction;\n");
    buf.append("public class E {\n");
    buf.append("    IntFunction<String> toString= new IntFunction<String>() {\n");
    buf.append("        @Override\n");
    buf.append("        public String apply(int i) {\n");
    buf.append("            return Integer.toString(i);\n");
    buf.append("        }\n");
    buf.append("    };\n");
    buf.append("}\n");
    String expected1 = buf.toString();

    assertExpectedExistInProposals(proposals, new String[] {expected1});
  }

  @Test
  public void testChangeLambdaBodyToBlock1() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("class E {\n");
    buf.append("    FI1 fi1a= x -> -1;\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("@FunctionalInterface\n");
    buf.append("interface FI1 {\n");
    buf.append("    int foo(int x);\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("->");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);

    assertNumberOfProposals(proposals, 2);
    assertCorrectLabels(proposals);

    buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("class E {\n");
    buf.append("    FI1 fi1a= x -> {\n");
    buf.append("        return -1;\n");
    buf.append("    };\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("@FunctionalInterface\n");
    buf.append("interface FI1 {\n");
    buf.append("    int foo(int x);\n");
    buf.append("}\n");
    String expected1 = buf.toString();

    assertExpectedExistInProposals(proposals, new String[] {expected1});
  }

  @Test
  public void testChangeLambdaBodyToBlock2() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("class E {\n");
    buf.append("    FI1 fi1b= x -> m1();\n");
    buf.append("    int m1(){ return 0; }\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("@FunctionalInterface\n");
    buf.append("interface FI1 {\n");
    buf.append("    int foo(int x);\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("->");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);

    assertNumberOfProposals(proposals, 2);
    assertCorrectLabels(proposals);

    buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("class E {\n");
    buf.append("    FI1 fi1b= x -> {\n");
    buf.append("        return m1();\n");
    buf.append("    };\n");
    buf.append("    int m1(){ return 0; }\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("@FunctionalInterface\n");
    buf.append("interface FI1 {\n");
    buf.append("    int foo(int x);\n");
    buf.append("}\n");
    String expected1 = buf.toString();

    assertExpectedExistInProposals(proposals, new String[] {expected1});
  }

  @Test
  public void testChangeLambdaBodyToBlock3() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("class E {\n");
    buf.append("    FI2 fi2b= x -> m1();\n");
    buf.append("    int m1() { return 0; }\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("@FunctionalInterface\n");
    buf.append("interface FI2 {\n");
    buf.append("    void foo(int x);\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("->");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);

    assertNumberOfProposals(proposals, 2);
    assertCorrectLabels(proposals);

    buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("class E {\n");
    buf.append("    FI2 fi2b= x -> {\n");
    buf.append("        m1();\n");
    buf.append("    };\n");
    buf.append("    int m1() { return 0; }\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("@FunctionalInterface\n");
    buf.append("interface FI2 {\n");
    buf.append("    void foo(int x);\n");
    buf.append("}\n");
    String expected1 = buf.toString();

    assertExpectedExistInProposals(proposals, new String[] {expected1});
  }

  @Test
  public void testChangeLambdaBodyToBlock4() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("class E {\n");
    buf.append("    FI2 fi2a= x -> System.out.println();\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("@FunctionalInterface\n");
    buf.append("interface FI2 {\n");
    buf.append("    void foo(int x);\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("->");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);

    assertNumberOfProposals(proposals, 2);
    assertCorrectLabels(proposals);

    buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("class E {\n");
    buf.append("    FI2 fi2a= x -> {\n");
    buf.append("        System.out.println();\n");
    buf.append("    };\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("@FunctionalInterface\n");
    buf.append("interface FI2 {\n");
    buf.append("    void foo(int x);\n");
    buf.append("}\n");
    String expected1 = buf.toString();

    assertExpectedExistInProposals(proposals, new String[] {expected1});
  }

  @Test
  public void testChangeLambdaBodyToExpression1() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("class E {\n");
    buf.append("    FI1 fi1= x -> {\n");
    buf.append("        return x=0;\n");
    buf.append("    };\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("@FunctionalInterface\n");
    buf.append("interface FI1 {\n");
    buf.append("    int foo(int x);\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("->");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);

    assertNumberOfProposals(proposals, 2);
    assertCorrectLabels(proposals);

    buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("class E {\n");
    buf.append("    FI1 fi1= x -> x=0;\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("@FunctionalInterface\n");
    buf.append("interface FI1 {\n");
    buf.append("    int foo(int x);\n");
    buf.append("}\n");
    String expected1 = buf.toString();

    assertExpectedExistInProposals(proposals, new String[] {expected1});
  }

  @Test
  public void testChangeLambdaBodyToExpression2() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("class E {\n");
    buf.append("    FI2 fi2= x -> {\n");
    buf.append("        new Runnable() {\n");
    buf.append("            public void run() {\n");
    buf.append("            }\n");
    buf.append("        };\n");
    buf.append("    };\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("@FunctionalInterface\n");
    buf.append("interface FI2 {\n");
    buf.append("    void foo(int x);\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("->");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);

    assertNumberOfProposals(proposals, 2);
    assertCorrectLabels(proposals);

    buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("class E {\n");
    buf.append("    FI2 fi2= x -> new Runnable() {\n");
    buf.append("        public void run() {\n");
    buf.append("        }\n");
    buf.append("    };\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("@FunctionalInterface\n");
    buf.append("interface FI2 {\n");
    buf.append("    void foo(int x);\n");
    buf.append("}\n");
    String expected1 = buf.toString();

    assertExpectedExistInProposals(proposals, new String[] {expected1});
  }

  @Test
  public void testChangeLambdaBodyToExpression3() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("class E {\n");
    buf.append("    FI2 fi2= x -> { m1(); };\n");
    buf.append("    int m1(){ return 0; }\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("@FunctionalInterface\n");
    buf.append("interface FI2 {\n");
    buf.append("    void foo(int x);\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("->");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);

    assertNumberOfProposals(proposals, 2);
    assertCorrectLabels(proposals);

    buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("class E {\n");
    buf.append("    FI2 fi2= x -> m1();\n");
    buf.append("    int m1(){ return 0; }\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("@FunctionalInterface\n");
    buf.append("interface FI2 {\n");
    buf.append("    void foo(int x);\n");
    buf.append("}\n");
    String expected1 = buf.toString();

    assertExpectedExistInProposals(proposals, new String[] {expected1});
  }

  @Test
  public void testChangeLambdaBodyToExpression4() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("class E {\n");
    buf.append("    FI2 fi2= x -> {\n");
    buf.append("        super.toString();\n");
    buf.append("    };\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("@FunctionalInterface\n");
    buf.append("interface FI2 {\n");
    buf.append("    void foo(int x);\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("->");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);
    buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("class E {\n");
    buf.append("    FI2 fi2= x -> super.toString();\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("@FunctionalInterface\n");
    buf.append("interface FI2 {\n");
    buf.append("    void foo(int x);\n");
    buf.append("}\n");
    assertNumberOfProposals(proposals, 2);
    assertCorrectLabels(proposals);

    String expected1 = buf.toString();

    assertExpectedExistInProposals(proposals, new String[] {expected1});
  }

  @Test
  public void testChangeLambdaBodyToExpression5() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("class E {\n");
    buf.append("    FI2 fi2= x -> {\n");
    buf.append("        --x;\n");
    buf.append("    };\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("@FunctionalInterface\n");
    buf.append("interface FI2 {\n");
    buf.append("    void foo(int x);\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("->");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);
    buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("class E {\n");
    buf.append("    FI2 fi2= x -> --x;\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("@FunctionalInterface\n");
    buf.append("interface FI2 {\n");
    buf.append("    void foo(int x);\n");
    buf.append("}\n");
    assertNumberOfProposals(proposals, 2);
    assertCorrectLabels(proposals);

    String expected1 = buf.toString();

    assertExpectedExistInProposals(proposals, new String[] {expected1});
  }

  @Test
  public void testChangeLambdaBodyToExpression6() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("class E {\n");
    buf.append("    FI2 fi2z= x -> { };\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("@FunctionalInterface\n");
    buf.append("interface FI2 {\n");
    buf.append("    void foo(int x);\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("->");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);
    assertNumberOfProposals(proposals, 1);
    assertCorrectLabels(proposals);
    assertProposalDoesNotExist(
        proposals, CorrectionMessages.QuickAssistProcessor_change_lambda_body_to_expression);
  }

  @Test
  public void testChangeLambdaBodyToExpression7() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("class E {\n");
    buf.append("    FI2 fi2c = x ->    {\n");
    buf.append("        return;\n");
    buf.append("    };\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("@FunctionalInterface\n");
    buf.append("interface FI2 {\n");
    buf.append("    void foo(int x);\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("->");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);
    assertNumberOfProposals(proposals, 1);
    assertCorrectLabels(proposals);
    assertProposalDoesNotExist(
        proposals, CorrectionMessages.QuickAssistProcessor_change_lambda_body_to_expression);
  }

  @Test
  public void testChangeLambdaBodyToExpression8() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("class E {\n");
    buf.append("    FI2 fi2c = x ->    {\n");
    buf.append("        int n= 0;\n");
    buf.append("    };\n");
    buf.append("}\n");
    buf.append("\n");
    buf.append("@FunctionalInterface\n");
    buf.append("interface FI2 {\n");
    buf.append("    void foo(int x);\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("->");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);
    assertNumberOfProposals(proposals, 1);
    assertCorrectLabels(proposals);
    assertProposalDoesNotExist(
        proposals, CorrectionMessages.QuickAssistProcessor_change_lambda_body_to_expression);
  }

  @Test
  public void testBug433754() throws Exception {
    IPackageFragment pack1 = fSourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("\n");
    buf.append("class E {\n");
    buf.append("    private void foo() {\n");
    buf.append("        for (String str : new String[1]) {\n");
    buf.append("        }\n");
    buf.append("    }\n");
    buf.append("}\n");
    ICompilationUnit cu = pack1.createCompilationUnit("E.java", buf.toString(), false, null);

    int offset = buf.toString().indexOf("str");
    AssistContext context = getCorrectionContext(cu, offset, 0);
    assertNoErrors(context);
    List proposals = collectAssists(context, false);
    buf = new StringBuffer();
    buf.append("package test1;\n");
    buf.append("\n");
    buf.append("class E {\n");
    buf.append("    private void foo() {\n");
    buf.append("        String[] strings = new String[1];\n");
    buf.append("        for (int i = 0; i < strings.length; i++) {\n");
    buf.append("            String str = strings[i];\n");
    buf.append("        }\n");
    buf.append("    }\n");
    buf.append("}\n");
    assertNumberOfProposals(proposals, 1);
    assertCorrectLabels(proposals);

    String expected1 = buf.toString();

    assertExpectedExistInProposals(proposals, new String[] {expected1});
  }
}
